How to simplify nested map calls?

Question

Suppose I have a few nested functors, e.g. List[Option[Int]] and need to call the map of the most inner one.

Now I am using nested m

Answer 1

From the question I understood that you are tying to prune the list iterator e.i. remove upper levels of list in that case you can use flatten which convert list of lists into a single list.

I will be removing few layers of list using flatten

Code:-

val lists = List( 
                    List( 
                        List(
                                List("1"),List("2")
                            ),
                        List(
                                List("3"),List("4") 
                            ) ,
                        List(
                                List("a"),List("b")
                            ),
                        List(
                                List("c"),List("d")
                            ) 
                            )
                  )

val innerVal = lists.flatten.foreach(println)

results :-

List(List(1), List(2))
List(List(3), List(4))
List(List(a), List(b))
List(List(c), List(d))